The main function of this command is to answer the question, How much of the system is being used?
Use this commend to:
Monitor resource usage
Validate your usage profile, for example, once the configuration is installed and calling traffic is normal, use the summary reports to determine if the actual usage profile is the same as the estimated usage profile.
Determine the idle occupancy and how much is available for growing the configuration.
Determine the processor occupancy and call levels on an hourly basis for the last 24 hours.